I-melanocyte luhlobo lweselingo olubhekiselele kwi-basal layout ye- epidermis . I-Melanocytes ivelisa i-melanin, i-brown pigment ejongene nombala wesikhumba kunye nokukhusela kwimiphumo emibi ye-UV ukukhanya. I-Melanocytes ikhona nakwizinwele kunye ne-irises yamehlo.
I-Makeup ye-Melanocytes
I-melanocytes ikhula kwi-neural crest: iqela lexeshana lamaseli e-embryonic athoxiswa njenge-tube ye-neural-okanye i-form-spinal-form form.
Ngethuba lesigxina sokuphila, i-melanocytes isuka kwi-neural crest ibe yindawo engqongqo ye-epidermis. I-Melanocyte ifakwe ngesebe, evumela ukuba batshintshe i-melanin kwezinye iiseli zesikhumba, njenge- keratinocytes . I-Keratinocytes yileli yintsholongwane yoluntu eqhelekileyo eyomeleza iinwele, izipikili kunye nesikhumba.
U ku velisa
I-melanocytes ivelisa i-melanin, efunyanwa kwiiseli ze-epidermal. Kukho iintlobo ezimbini ezahlukeneyo ze-melanin ezivelisa i-melanocytes: i-eumelanin, emnyama embala, kunye ne-phaeomelanin, enokuthi ibomvu okanye iphuzi.
Imveliso ye-Melanin ilawulwa yi-peptide hormone ekhoyo kwi-gland gland ebizwa ngokuba yi-hormonecyte-stimulating hormone. Izicubu zezilwanyana kunye namazinga e-estrojeni ayenzekayo ngexesha lokukhulelwa kubangela ukuba i-pituitary gland ivelise ngaphezulu kwe-hormone.
Kodwa i-melanocytes ayisoloko isebenza njengoko kufanelekile. I-Vitiligo, umzekelo, yimeko yesikhumba esihlala kuyo apho i-melanocytes ayifuni ukuvelisa i-melanin, okubangelwa kumhlophe okwe-white-shaped patches of skin okukhula ngokukhawuleza.
Ukungabikho kwe-melanin kwakhona kuguquka iinwele kwiindawo ezichaphazelekayo ezimhlophe. Ezinye iimeko ezichaphazelekayo ngenxa yokungabikho kwe-melanin ziquka i- albin kunye ne-phenylketonuria.
Ukubaluleka kweMelanin
Umbala wesikhumba somntu uhluka. Umthunzi wayo ochanekileyo ugqitywa yigazi eligeleza kulo, ukutya, kunye ne-melanin eyenziwa yi-melanocytes.
Abantu ngokubanzi banomlinganiselo ofanayo we-melanocytes; inani le-melanin ukuba ezo zityalo zivelise, nangona kunjalo, yiyo eyahluka.
UMelanin ukhusela ulusu ngokulukhusela elangeni. Xa ulusu lucacisa ilanga, ukuveliswa kwemveliso ye-melanin kwanda, yintoni eyenza i-tan. Yindlela yokuzikhusela yendalo yomzimba ekuchaseni ilanga.
Ixesha elangeni liza ngeNdleko
Wonke umntu ubonakala engcono ngokukhanya, kodwa kuza ngeendleko. Ukuchitha ixesha elongezelelweyo elangeni (okanye kwibhedi yokuqhawula) kuyingozi. Thatha ukushisa ilanga, umzekelo. Kuthatha ixesha lokuba i-melanocytes ivelise i-melanin kwaye ikhusele isikhumba kwimisebe yingozi yelanga. Xa i-melanocytes ayikwazi ukusebenza ngokukhawuleza ukudala i-tan, ii-UV ezikhanyayo ezisuka elangeni zinokutshisa ulusu kwaye ziyeke zikhangele i-pink okanye zibomvu. Umonakalo welanga uphinde uqokelele ngokuhamba kwexesha, ezinokubangela umdlavuza wesikhumba. Ukukhanyisa isikhumba sakho, umngcipheko omkhulu wokuba nomhlaza wesikhumba. Ngoko qiniseka ukuba ubona i-dermatologist rhoqo ukuhlolwa kwesikhumba.
Ukukhanya kwelanga akuko konke okubi, nangona kunjalo. Ulusu lisebenzisa ilanga ukuze lenze i-vitamin D, eyenza i-calcium ibambelele kwaye ibalulekile ekusebenzeni kwamathambo nokukhula.